Supported Features - HPE 5800 Series Configuration Manual

Table 5 shows that different PDUs contain different CLVs. Code 1 through 10 of are defined in ISO
10589 (code 3 and 5 are not shown in the table), and others are defined in RFC 1195.
Table 5 CLV codes and PDU types
CLV Code
1
2
4
6
7
8
9
10
128
129
130
131
132

Supported features

Multiple instances and processes
IS-IS supports multiple instances and processes. Multiple processes allow an IS-IS process to
operate in concert with a group of interfaces. A router can run multiple IS-IS processes, and each
process corresponds to a unique group of interfaces.
For routers supporting VPN, each IS-IS process is associated with a VPN instance, which means the
VPN instance is also associated with interfaces of the process.
Master/slave switchover
IS-IS backs up necessary data from the master device to the slave device. Whenever the master
device is down, the slave device can switch to the active status to run IS-IS.
IS-IS supports the following backup modes:
•
Nonstop routing (NSR)—Backs up all IS-IS data. After Master/Slave failover, IS-IS can work
immediately.
•
Graceful restart (GR)—Backs up only the configuration of IS-IS. After active/standby failover,
IS-IS performs graceful restart to synchronize the LSDB with neighbors.
IS-IS Graceful Restart
GR ensures the continuity of packet forwarding when a routing protocol restarts or an active/standby
switchover occurs:
•
GR Restarter—Graceful restarting router. It must be GR capable.
•
GR Helper—A neighbor of the GR Restarter. It helps the GR Restarter to complete the GR
process.
After an IS-IS GR Restarter restarts, it must complete the following tasks to synchronize the LSDB
with its neighbors:
Name
Area Addresses
IS Neighbors (LSP)
Partition Designated Level 2 IS
IS Neighbors (MAC Address)
IS Neighbors (SNPA Address)
Padding
LSP Entries
Authentication Information
IP Internal Reachability Information
Protocols Supported
IP External Reachability Information
Inter-Domain Routing Protocol Information
IP Interface Address
122
PDU Type
IIH, LSP
LSP
L2 LSP
LAN IIH
LAN IIH
IIH
SNP
IIH, LSP, SNP
LSP
IIH, LSP
L2 LSP
L2 LSP
IIH, LSP